摘要
基于半主动悬架车辆的1/4动力学模型,论述了磁流变液特性及磁流变减振器的工作原理,推导了在随机最优控制理论下可调阻尼力和状态变量之间的关系,应用matlab/simulink编制了人车路模型的仿真程序,并以简化模型为例,考察了在磁流变阻尼器控制下的人车路平顺性问题.计算结果表明,与没有磁流变减振器的被动悬架相比较,该减振器的应用能够较好的改善汽车的平顺性,对提高人体的舒适性以及进一步深入研究该系统的振动,改善道路的振动特性有一定的指导意义.
The properties of magnetorheological fluid and the theory of magnetorheological fluid shock absorber were discussed based on quarter vehicle dynamics model of semi-active suspension. We obtained the correlation between the adjusted damp and the state space variable with the theory of stochastic optimal control. The system performance simulation program for 3 DOFg vechile model was developed by using matlab language. As an illustrative, the road induced random response of a man-car-road model with magnetorheological fluid shock absorber was explored. The results show that the vehicle ride comfort can be improved by the control strategy, and it also has guiding significance for improving the comfort of human body under vibrating vehicle and for improving the vibration behavior of road.
出处
《动力学与控制学报》
2007年第2期183-188,共6页
Journal of Dynamics and Control
关键词
随机最优控制理论
磁流变阻尼器
状态变量
阻尼力
stochastic optimal control theory, magnetorheological fluid shock absorber, state space variable, damp
